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Multi-sensor information fusion applied to intelligent building field and a corresponding control scheme of fire automation control system based on information fusion is presented in this paper. There are six levels in the control scheme, including sensor layer, sensor subsystem layer, primary fusion subsystem layer, decision management subsystem layer, actuator subsystem layer and actuator layer. The functions, constitutions and adaptive algorithms of the six levels in the control scheme are detailed. Meanwhile, .the whole optimization performance of the control scheme is analyzed. The control system presented in this paper can be put in practice in intelligent building to realize fire alarm and fire protection automatically. The system possess many excellencies such as high-efficiency, high stabilization, lower mistake alarm and action and saving expenses. There will producing enormous economy benefit and community benefit in case of make use of this control system practically.